package com.sky.service.impl;

import com.github.pagehelper.PageHelper;
import com.github.pagehelper.Page;
import com.sky.constant.MessageConstant;
import com.sky.constant.PasswordConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.dto.EmployeeDTO;
import com.sky.dto.EmployeeEditPasswordDTO;
import com.sky.dto.EmployeeLoginDTO;
import com.sky.dto.EmployeePageQueryDTO;
import com.sky.entity.Employee;
import com.sky.exception.AccountLockedException;
import com.sky.exception.AccountNotFoundException;
import com.sky.exception.PasswordErrorException;
import com.sky.mapper.EmployeeMapper;
import com.sky.result.PageResult;
import com.sky.service.EmployeeService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.util.DigestUtils;

import java.util.List;
@Slf4j
@Service
public class EmployeeServiceImpl implements EmployeeService {

    @Autowired
    private EmployeeMapper employeeMapper;

    /**
     * 员工登录
     *
     * @param employeeLoginDTO
     * @return
     */
    public Employee login(EmployeeLoginDTO employeeLoginDTO) {
        String username = employeeLoginDTO.getUsername();
        String password = employeeLoginDTO.getPassword();

        //1、根据用户名查询数据库中的数据
        Employee employee = employeeMapper.getByUsername(username);

        //2、处理各种异常情况（用户名不存在、密码不对、账号被锁定）
        if (employee == null) {
            //账号不存在
            throw new AccountNotFoundException(MessageConstant.ACCOUNT_NOT_FOUND);
        }

        //密码比对
        //对前端传过来的明文进行md5加密处理
        password=DigestUtils.md5DigestAsHex(password.getBytes());
        if (!password.equals(employee.getPassword())) {
            //密码错误
            throw new PasswordErrorException(MessageConstant.PASSWORD_ERROR);
        }

        if (employee.getStatus() == StatusConstant.DISABLE) {
            //账号被锁定
            throw new AccountLockedException(MessageConstant.ACCOUNT_LOCKED);
        }

        //3、返回实体对象
        return employee;
    }

    /*
     * 新增员工
     * */
    @Override
    public void save(EmployeeDTO employeeDTO) {
        Employee employee=new Employee();
        //对象属性拷贝
        BeanUtils.copyProperties(employeeDTO,employee);//从前面拷到后面
//        employee.setUpdateTime(LocalDateTime.now());
        employee.setStatus(StatusConstant.ENABLE);//1正常，0锁定
//        employee.setCreateTime(LocalDateTime.now());
        employee.setPassword(DigestUtils.md5DigestAsHex(PasswordConstant.DEFAULT_PASSWORD.getBytes()));
        //当前登录的用户id
/*        employee.setCreateUser(BaseContext.getCurrentId());
        employee.setUpdateUser(BaseContext.getCurrentId());*/
        employeeMapper.insert(employee);
    }

    //员工分页查询
    @Override
    public PageResult pageQuery(EmployeePageQueryDTO employeePageQueryDTO) {
        //开始分页查询
        PageHelper.startPage(employeePageQueryDTO.getPage(),employeePageQueryDTO.getPageSize());
        Page<Employee> page=employeeMapper.pageQuery(employeePageQueryDTO);
        long total=page.getTotal();
        List<Employee> records=page.getResult();
        PageResult pageResult=new PageResult();
        pageResult.setTotal(total);
        pageResult.setRecords(records);
        return pageResult;
    }

    @Override
    public void startOrStop(Integer status, Long id) {
/*        Employee employee=new Employee();
        employee.setId(id);
        employee.setStatus(status);*/
        Employee employee=Employee.builder()
                .status(status)
                .id(id)
                .build();

        employeeMapper.update(employee);
    }

    @Override
    public Employee findById(Long id) {
        Employee employee=employeeMapper.findById(id);
        return employee;
    }

    @Override
    public void update(EmployeeDTO employeeDTO) {
        Employee employee=new Employee();
        BeanUtils.copyProperties(employeeDTO,employee);
//        employee.setUpdateTime(LocalDateTime.now());
//        employee.setUpdateUser(BaseContext.getCurrentId());
        employeeMapper.update(employee);
    }

    @Override
    public void editPassword(EmployeeEditPasswordDTO employeeEditPasswordDTO) {
        //先将密码转换为md5
        String OldPassword =employeeEditPasswordDTO.getOldPassword();
        String md5OldPassword=DigestUtils.md5DigestAsHex(OldPassword.getBytes());
        //获取当前用户id
        Long id=BaseContext.getCurrentId();
        //根据用户名查询数据库中的密码
        String nowPassword=employeeMapper.PasswordById(id);
        employeeEditPasswordDTO.setId(id);
        if (nowPassword.equals(md5OldPassword)){
            log.info("密码正确可以更改");
            //更改密码
            String newPassword=employeeEditPasswordDTO.getNewPassword();
            String md5newPassword=DigestUtils.md5DigestAsHex(newPassword.getBytes());
            employeeEditPasswordDTO.setNewPassword(md5newPassword);
            employeeMapper.editPassword(employeeEditPasswordDTO);
        }
        else{
            log.info("密码错误，错误密码为{},数据库查询为{},老的MD5密码为：{}，当前用户id为{}",OldPassword,nowPassword,md5OldPassword,employeeEditPasswordDTO.getId());
            throw new PasswordErrorException(MessageConstant.USER_OLD_PASSWORD_WRONG);
        }
    }
}
